Gasket Set, Compatible with Pump Type In-Line Circulating Pumps, Compatible with Series 2 1/2 In., HD 3, LD 3, PD 35, PD 37, PD 38, PD 39, PD 40, Compatible with Series Family 2 1/2 In., HD 3, LD 3, PD 35, PD 37, PD 38, PD 39, PD 40, Gasket Material Nitrile Rubber, Includes O-Ring, Compatible with Brand Bell and Gossett, Compatible with Grainger Part Number 4RC97, 4RC98, 4RC99, 4RD02, 4RD13, 4RD14, 5JPD7, 5JPD8